Nail nicks never really bothered me and I suspect if I ever got my hands on a left handed Wenger it would confuse the hell out of my fingers.

OHO blades though; that's a whole different story. It always amazed me that LM made a whole new blade for the Danish market but have never made one for what, statistically, has to be one tenth of their market.

Lefties, in short, are statistically slightly more intelligent than right hand dominant people. That may give an advantage of being faster to adapt to a right-hand oriented tool using the left hand.Now whether the intelligence will predispose someone to be left-hand dominant, or if left-hand dominance makes people more clever from navigating the right-hand dominant world, is an entirely different topic. Which I won't dive into.

Now, that said. In regards to most SAKs, I would say that the tools aren't specifically designed for the right hand usage. My reasoning for this is that using the left hand opening methods doesn't necessarily have to be like operating it with the right hand. Just use different fingernails to open blades. Once that is the case and one has become very efficient with operating the SAK left-handed, then it looks like they have been leaving right handed people out.

Same with MT scissors. It doesn't take much effort to reposition hand-opposed scissors configurations. I use tons of MT scissors with either hand frequently. It is just a matter of tilting the medium to see the cutting with opposite blade configurations. The the thumb can always be, of whichever dominant hand we discuss, repositioned to operate the scissors more effectively.

3. Painful.Tools physically contoured for right-hand use that are downright painful or sometimes impossible for a left-hander to use. Examples include scissors with ergonomically shaped handles, firearms with thumb rests or shaped stocks, and any other object that requires a firm or prolonged grip that is contoured for the right hand.

Fortunately, most tools fall into categories 1 and 2 and as a lefty I hardly take any notice of the difference. (with left hand :-)

3. Painful.Tools physically contoured for right-hand use that are downright painful or sometimes impossible for a left-hander to use. Examples include scissors with ergonomically shaped handles, firearms with thumb rests or shaped stocks, and any other object that requires a firm or prolonged grip that is contoured for the right hand.

Fortunately, most tools fall into categories 1 and 2 and as a lefty I hardly take any notice of the difference. (with left hand :-)

I've been living in a 'right-handed' world all-of-my-life. So most things are just mildly annoying, as others have stated. I wish, more companies would step-up like Benchmade has with the axis-lock on their ambi auto-knives. They would garner more sales with southpaws by selling some dedicated models.

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Ambidextrous tools are the best as some situations force you to use the other hand. Combat training teaches you to be proficient with your less dominant hand when handling weapons, and if life, you can be faced with an unexpected situation that disables an arm or hand, and you need to deploy a knife or tool by yourself.

Unfortunately, ambidextrous tools require unique designs, and as SAKs and MTs are generally not left/right symmetrical, this can be difficult. The exception are tools that can deploy kinetically, such as some MT pliers. Leatherman Free may also fall into this category because of the new magnetic deployment system...we’ll have to see.

I suppose back locks knives and MTs with symmetrical locks are ambidextrous, but only if the tool supports left/right hand OH opening.